I wouldn't fret about it - if you're feeling better...having improvements then celebrate them.
My new LLMD (Dr. J) doesn't use the CD57 and my last LLND didn't use it either - he said he's not found it reliable/useful.
I didn't ask Dr. J what his thoughts were on it.
Yes fretting just makes things worse. And cd 57 might improve if your still treating as it did with another poster last weekend.
This test IS accurate in measuring immune cells. Further/deeper testing will show this, as I have done repeatedly. **What its not so useful is trying to collaborate cd57 level with lyme infection level. Which is usually LLMD's sole concern.**
I would not totally discredit this test though, if/when people feel "cured", but still have low cd57, it means they have low immunity somewhere in their white blood cell types, which can be found with further testing. Remember, there is a reason why lab tests have ranges.